I am new to this site and just recently purchased an Amazon Fire stick and installed Kodi v17.4 via Downloader on my TV.

What should i do next to start watching live TV, movies and Sports ?

Thank you in advance,NewToKodi

Look at some of the install guides on here. I suggest Covenant, Elysium, Sports Devil if you like sports, Bennu and maybe made in canada. Watching live streams can be very hit and miss unless you want to pay for an iptv subscription.